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公开(公告)号：JPH0797995A
公开(公告)日：1995-04-11
申请号：JP19775394
申请日：1994-07-29
Applicant: ZEXEL CORP
Inventor： SAITO SUSUMU , TAKAGI NOBUKAZU , HARADA KIYOHIRO , KAZAHAYA YUKIO , KUCHIKI SEIJI , ISHIKAWA MASAKUNI , NAKAJIMA NOBUFUMI
Abstract: PURPOSE:To provide sufficient lubrication and sealing by forming a passage of oil that passes through a spiral groove serving as a pump by rotation of a drive shaft to lubricate a main bearing, and a passage of oil that is allowed to pass through an oscillating bearing portion, etc., by the differential pressure between an oil space and an intake chamber. CONSTITUTION:An oscillating scroll 28 driven by the drive shaft 10 of an electric motor 8 and a fixed scroll 35 sandwiching the oscillating scroll 28 between it and a block 17 are enclosed in a high-pressure space 43 inside a closed case 6. In this case, an oil reservoir 22 formed in the high-pressure space 43 communicates with the space between the end portion of the drive shaft 10 and the block 17 by way of an oil space 46 and is isolated by a seal bearing from an oscillation space 47 defined by the oscillating scroll 28 and the block 17. A spiral groove 50 having one end open to the oil space 46 and the other end rising to the upper end of a main bearing 19 is formed on the outer peripheral side of the drive shaft 10. The oil space 46 is communicated with a bearing space by an oil introducing hole 49.
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公开(公告)号：JPH11247778A
公开(公告)日：1999-09-14
申请号：JP387999
申请日：1999-01-11
Applicant: ZEXEL CORP
Inventor： ISHIKAWA MASAKUNI
Abstract: PROBLEM TO BE SOLVED: To improve the sealability of a sliding portion by forming an oil supply passage on a movable scroll member, communicating a point of this oil supply passage with a coolant gas suction port of a compression chamber, and forming an opening area of the point of the oil supply passage smaller than a sectional area of a part where the point is opened. SOLUTION: In a scroll fluid machine 1, a fitting recessed portion 8b is formed in a large diameter portion 8a of an upper edge side of a driving shaft 8, and a connection inserting portion 21a of a movable scroll member 21 is inserted into the fitting recessed portion 8b through a radial bearing 22. On this occasion, an oil supply passage 47 is formed on the movable scroll member 21, and a point of the oil supply passage 47 is communicated with a coolant gas suction port of a compression chamber formed by both of scroll members 21, 27. An opening area of the point of the oil supply passage 47 communicated with the coolant gas suction port is formed smaller than a sectional area of a part where the point is opened. Whereby the temperature rising of the oil can be inhibited and the sealability of each compression chamber can be improved.
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公开(公告)号：JPH11247777A
公开(公告)日：1999-09-14
申请号：JP387799
申请日：1999-01-11
Applicant: ZEXEL CORP
Inventor： ISHIKAWA MASAKUNI
Abstract: PROBLEM TO BE SOLVED: To improve the sealability and lubricity of a sliding portion by forming an oil supply passage on a movable scroll member, communicating a point of the oil supply passage with a coolant gas suction port of a compression chamber toward a fixing member fixed inside of a case and communicating the other end with an oil passage. SOLUTION: In a scroll fluid machine 1, a fitting recessed portion 8b is formed in a large diameter portion 8a of an upper edge side of a driving shaft 8, and a connection insertion portion 21a of the movable scroll member 21 is inserted into the fitting recessed portion 8b through a radial bearing 22. On this occasion, an oil supply passage 47 is formed on the movable scroll member 21, the oil supply passage 47 is communicated with a coolant gas suction port of a compression chamber toward seam plate fixed inside of a case 2, and the other end is opened to a fitting gap 9 from the connection inserting portion 21a to be communicated with an oil passage 40. By supplying the oil to a suction pressure chamber 28 separately from the oil for lubricating a bearing portion, the sealability of each compression chamber can be improved.
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公开(公告)号：JPH11247772A
公开(公告)日：1999-09-14
申请号：JP341099
申请日：1999-01-08
Applicant: ZEXEL CORP
Inventor： ISHIKAWA MASAKUNI
Abstract: PROBLEM TO BE SOLVED: To improve sealability and lubricancy in a sliding part in meshing between movable and fixed scroll members in a scroll fluid machine. SOLUTION: A scroll fluid machine 1 has a driving shaft 8 for an electric motor 7 rotatably supported by a support block 10, a movable scroll member 21, a fixed scroll member 27, and an oil passage for introducing oil suctioned by an oil pump to a bearing part. A connection/insertion part is projected on a back surface of the movable scroll member 21 which has an oil supply passage. A leading end of the oil supply passage is communicated with a cooling medium gas suctioning port of a compression chamber formed by the scroll members. The other end of the passage is communicated with the oil passage through the connection/insertion part.
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公开(公告)号：JPH11141478A
公开(公告)日：1999-05-25
申请号：JP32038797
申请日：1997-11-06
Applicant: ZEXEL CORP
Inventor： ISHIKAWA MASAKUNI , UNE KATSUTAKA , TAKAGI NOBUKAZU
Abstract: PROBLEM TO BE SOLVED: To provide a proper feed oil metering in a low-speed, low-load operation and a high-speed, high-load operation in a compressor in which the differential feed oil quantity is regulated by the clearance formed between a rocking shaft and a rocking bearing by providing a metering part having a large sectional area over a prescribed range. SOLUTION: In operation of a compressor 1, the oil in an oil space 86 is passed to a bearing space 33 through an oil guide hole 93 to lubricate the contact sliding part between a rocking bearing 31 and a rocking shaft 18, and carried to a rotating space 62. This lubricating quantity is determined by the clearance between the rocking shaft 18 and the rocking bearing 31. A metering part 95 having a large sectional area is formed in a prescribed range of the contact sliding part between the rocking shaft 18 and the rocking bearing 31 by chamfering the tip part of the rocking shaft 18 in a prescribed range. In a high-speed, high-load operation, the oil quantity is properly limited by the throttling effect by the part other than the metering part 95, and in a low-speed, low-load operation, a proper oil quantity is ensured by reducing the throttling effect by the metering part 95.
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Patent Agency Ranking
公开(公告)号：JPH11132169A
公开(公告)日：1999-05-18
申请号：JP30942397
申请日：1997-10-23
Applicant: ZEXEL CORP
Inventor： KAWAI SATOSHI , ISHIKAWA MASAKUNI , OOIKE HIROAKI , TANABE HIROMICHI
Abstract: PROBLEM TO BE SOLVED: To stably secure amount of suctioned oil by guiding oil supplied to the most upstream side of a lubricating oil passage from a place with temperature as low as possible and by preventing an oil suction amount from fluctuation due to oil surface turbulence caused by refrigerant's pulsating flow or others. SOLUTION: A compressing part side oil sump 74 is directly shut off from a driving part side high pressure space 71 and a driving part side oil sump 73 via a fixing scroll member 40 and a block 15, and therefore, its oil surface's fluctuation due to refrigerant's pulsating flow or others is restrained. The compressing part side oil sump 74 is in the condition that it is separated from heat generation by a rotor or a stator comprising a driving part 3, and accommodates lower temperature lubricating oil due to heat radiation from a sealed case 2. Oil for lubricating a compressing part 4 is directly guided from the compressing part side oil sump 74 to the most upstream side of an oil passage 100.
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公开(公告)号：JPH1162859A
公开(公告)日：1999-03-05
申请号：JP22568797
申请日：1997-08-07
Applicant: ZEXEL CORP
Inventor： ISHIKAWA MASAKUNI , OOIKE HIROAKI , TANABE HIROMICHI , KAWAI SATOSHI
Abstract: PROBLEM TO BE SOLVED: To improve lubricity of a bearing part and suppress a rise in temperature by forming annular oil pressure space at the tip part on the discharge side of a spiral pump, arranging a seal part between oil pressure space and high pressure space and exhausting oil stayed in oil pressure space to an oil reservoir by an oil exhaust passage. SOLUTION: Annular oil pressure space 28 is formed at a portion in which the discharge side of a spiral pump 27 of a drive shaft is opened. A seal part 61 is arranged between oil pressure space 28 and high pressure space 74 and an oil exhaust passage communicating the oil pressure space 28 and an oil reservoir 75 is provided. Thus, lubricating oil in the oil pressure space 28 is raised to prescribed pressure, and oil space 26 in which one end of the spiral pump 27 is opened and the high pressure space 74 are completely interrupted. Further, oil within the oil pressure space 28 can be exhausted to the oil reservoir 75 and circulated. Rises in temperatures between the drive shaft and a main bearing 23 and between the drive shaft and the seal part 61 can be suppressed.
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公开(公告)号：JPH1150986A
公开(公告)日：1999-02-23
申请号：JP30942297
申请日：1997-10-23
Applicant: ZEXEL CORP
Inventor： KAWAI SATOSHI , OOIKE HIROAKI , TANABE HIROMICHI , ISHIKAWA MASAKUNI
Abstract: PROBLEM TO BE SOLVED: To dispense with a cover for covering the turning range of a balance weight as well as to improve stable oil suction. SOLUTION: Since a part between oil in an oil reservoir on a balance weight side, to be stirred by the rotation of the balance weight 19 and oil on the side of oil sucking pipe 80 having the opening end of to be sunk can be shielded by providing a shielding plate 96 for shielding a part between the oil sucking pipe 80 provided on a block 15 and the balance weight 19 provided on a rotary shaft 13 in the specified range, fluctuation of oil level to be generated caused by the balance weight 19 can be restrained.
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公开(公告)号：JPH08189481A
公开(公告)日：1996-07-23
申请号：JP33861494
申请日：1994-12-28
Applicant: ZEXEL CORP , TAMA MFG
Inventor： ISHIKAWA MASAKUNI , KAZAHAYA YUKIO , KUCHIKI SEIJI
Abstract: PURPOSE: To easily install a thrust bearing on a block without requiring screwing by meshing a claw formed on a thrust bearing with a groove formed on a boss extended from a lower end surface of a block. CONSTITUTION: Since thrust load is applied to a lower end surface of a block 16 from an oscillating scroll member 20, a thrust bearing 70 is arranged between the lower end surface and a back surface of the oscillating scroll member 20. The thrust bearing 70 is circularly formed of sintered alloy, etc., being provided with a claw 13 which is projected in a diameter direction. A boss 76 which abuts against an inner peripheral side surface of the thrust bearing 70 is extended from the lower end surface of the block 16. The boss 76 is formed with an engagement groove 77 with which the claw 73 of the thrust bearing 70 is engaged. The thrust bearing 70 can thus be fixed to the block 16. The thrust bearing 70 can easily be installed without requiring installation parts such as screws and pins.
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公开(公告)号：JPH07151078A
公开(公告)日：1995-06-13
申请号：JP25453594
申请日：1994-09-22
Applicant: ZEXEL CORP
Inventor： NAKAJIMA NOBUFUMI , SAITO SUSUMU , ISHIKAWA MASAKUNI
Abstract: PURPOSE:To improve the performance of refrigerant to be separated from lubricating oil by providing a circumferential wall cover along the range of rotation of a balance weight, and positioning the upper end part of the opening part of a refrigerant passage which is formed on the circumferential wall cover downward from the bottom end surface of the balance weight. CONSTITUTION:A main shaft is rotatably maintained while penetrating the center of a block, a circumferential wall cover 27 is fixed to the upper end of the block, a swinging scroll member is maintained on the bottom end thereof. The circumferential wall cover 27 is so provided as enclosing on the block, a turn space 27c in which a balance weight 17 turns, and forming a refrigerant passage 27a' and a lubricating oil passage thereon. In this case, the upper end of an opening part which is opened on the circumferential wall part of the refrigerant passage 27' is positioned below the bottom end part in the range of rotation of the balance weight 17. The refrigerant passing the refrigerant passage 27a' is stirred as well as forced to collide with the bottom end surface of the balance weight 17 so as to separate the refrigerant from lubricating oil effectively.
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